/**
 * mixed any
 * @flow
 */

 function passMixed(value: mixed) {
  //  value++
  if(typeof value === "string") {
    // to do...
  }

  if(typeof value === "number") {
    // to do...
  }
 }
 passMixed("1231")
 passMixed(1200)

//  区别， any 弱类型, mixed 强类型
 function passAny (value: any) {
  value.substr(1,1)
  value++
 }